Human anatomy, including structure and development and practical considerations . res, turnsharply brainw^ard after crossing- the raphe and ^?- 923- constitute the chief con-stituents of the mesialfillet. The second set, theanterior superficialarcuate fibres, alsocross the mid-line, butthese, instead of turningupward, pass forward,enter through the pyra-mid or along its medianaspect, and, gaining thesurface, sweep over thepyramid and olivary emi-nence and thence proceedbackward to the restiformbody and on to the cere-bellum. An oval collection of small fusiform nerve-cells, the arcuate nucleus
Human anatomy, including structure and development and practical considerations . res, turnsharply brainw^ard after crossing- the raphe and ^?- 923- constitute the chief con-stituents of the mesialfillet. The second set, theanterior superficialarcuate fibres, alsocross the mid-line, butthese, instead of turningupward, pass forward,enter through the pyra-mid or along its medianaspect, and, gaining thesurface, sweep over thepyramid and olivary emi-nence and thence proceedbackward to the restiformbody and on to the cere-bellum. An oval collection of small fusiform nerve-cells, the arcuate nucleus(nucleus arcuatus) lies in the path of these fibres, at first on the ventral surface of thepyramid and then along the median fissure. Whilst some additional arcuate fibresarise from the cells of the nucleus, the majority sweep by without third set, the posterior superficial arcuate fibres, proceed from the cells ofthe gracile and cuneate nuclei of the same side and pass beneath the ventricularfloor to the adjacent restiform body and thence to the Deep arcuate nterior superficial arcuate Arcuate nucleus Diag-ram illustrating source and path of arcuate fibres; RB, restiform body;r, pyramidal tract; O, inferior olivary nucleus. Fig. 924. Nucleus gracilis Nucleus cuneatus internusNuc. cuneatusexternus Funiculus cuneatus Fasciculus solitarius- Nucleus lateralis --
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
